The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 13, 2011
Filed:
Apr. 09, 2009
Shih-chang Chen, Taipei Hsien, TW;
Shen-an Chen, Taipei Hsien, TW;
Rong-cong Hung, Taipei Hsien, TW;
You-ren Lin, Taipei Hsien, TW;
Rong-hwang Horng, Taipei Hsien, TW;
Yaw-shen Lai, Taipei Hsien, TW;
Shih-Chang Chen, Taipei Hsien, TW;
Shen-An Chen, Taipei Hsien, TW;
Rong-Cong Hung, Taipei Hsien, TW;
You-Ren Lin, Taipei Hsien, TW;
Rong-Hwang Horng, Taipei Hsien, TW;
Yaw-Shen Lai, Taipei Hsien, TW;
Foxnum Technology Co., Ltd., Tu-Cheng, New Taipei, TW;
Abstract
A speed controller used in a control loop of a motor includes a comparator, a processing device, and an arithmetic logical unit (ALU). The comparator compares a received instruction speed or a received measured speed of the motor with a predetermined speed value, outputs a first signal to the processing device when the received speed is greater than the predetermined speed value, or outputs a second signal to the processing device when the received speed is equal to or less than the predetermined speed value. The processing device receives a speed difference between the instruction speed and the measured speed. The processing device outputs a first proportional value when the first signal is received, or outputs a second proportional value when the second signal is received. The ALU outputs an instruction current to the control loop by calculating the proportional value according to a predetermined calculation rule.